I've remapped the Ctrl-/ and Ctrl-? keys to be comment-out-region and
uncomment-out-region respectively as these keystrokes are lost when in VI mode.
But the preference for 'Retain Select' (Editor -> Advanced -> Selection
Policy) is not being obeyed - the selection is canceled afterwards. I'd say
this is a bug.
(Long term, it would be nice if these key mappings were pre-existing in VI
mode. They're really handy.)
Thanks,
Michael